深圳大运中心体育场钢屋盖结构设计若干关键技术研究  

Research on several key technologies for structural design of steel-roof of the Shenzhen Universiade Sports Centre

作　　者：张建军 刘琼祥 刘臣 郭满良 彭省华 杨德喜 王启文 

机构地区：[1]深圳市建筑设计研究总院有限公司,广东深圳518031

出　　处：《建筑结构学报》2011年第5期48-55,共8页Journal of Building Structures

摘　　要：深圳大运中心体育场钢屋盖采用单层折面空间网格结构。80多吨的超大铸钢节点密切结合铸造工艺特点,通过有限元计算分析和节点构造等的优化提高节点质量。对碗盖球的铸钢球铰支座进行包括接触的弹性和弹塑性有限元分析,提出了简化接触边界条件的弹性阶段实用计算方法,采取了支座充分转动和防脱臼措施。对钢板热成型圆管进行了材质比较、成型后产品检验。分析表明:超大铸钢节点安全可靠;球铰支座极限荷载达到设计荷载的3.1倍,支座上部碗体壳局部接触区域存在三向拉力场,下部实心半球局部承压区域呈三向受压状态。预留凹槽、空隙可实现支座充分转动,设置裙边、穿心锚栓可防止意外脱臼的发生;内径与壁厚比值小于20圆管可采用热成型,钢板宜优先采用高效的Q345GJ钢,成品经检测各项指标均满足或高于国家标准要求。A new type of structural system named as single-layer folded-plane latticed shell structure was adopted for the steel roof of main stadium of the Shenzhen Universiade Sports Center.Although there are over 80 tons of massive cast-steel nodes,its good quality is assured since the design was based on finite element analysis and optimization of the joint structure.Both elastic finite element analysis and elasto-plastic finite element analysis on the cast steel spherical joint supports were conducted.This paper proposes a very practical calculation method for the elastic stage by simplifying the contact boundary.For the calculation,it is necessary to ensure a full rotation of the support and take anti-separation measures.Moreover,material comparison among hot-formed steel pipes and inspections to the finished products need to be conducted.From the analysis,it is believed that massive cast-steel nodes are safe and reliable.The ultimate load carrying capacity of the spherical joint support reaches 3.1 time of the design capacity.In the bowl-shell,there are three directional tension fields.The lower part of the hollow ball partially bears the stress in three directions.To fully rotate the support,concave-slots and gaps need to be reserved beforehand.To avoid the occurrence of accidental separation,an apron and center-hole anchor bolts need to be used.In the case that the ratio of inner radius to the wall thickness is 20,a hot-formed steel pipe can be adopted.The Q345GJ steel is preferentially used for the steel plate.According to the inspection results,the indices of the product satisfy the requirements of national standards.

关 键 词：单层折面空间网格结构 超大铸钢节点 碗盖球的球铰支座 有限元分析 力学性能 

分 类 号：TU393.3[建筑科学—结构工程] TU318